leds: lm3692x: Correct headers (of*.h -> mod_devicetable.h)

There is no user of of*.h headers, but mod_devicetable.h.
Update header block accordingly.
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

drivers/leds/leds-lm3692x.c

@@ -7,10 +7,9 @@
 #include <linux/init.h>
 #include <linux/leds.h>
 #include <linux/log2.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
-#include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>